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-rw-r--r--Unix.mk2
-rw-r--r--Win.mk2
-rw-r--r--src/boot.S3
-rw-r--r--src/cpu/irq.c38
-rw-r--r--src/cpu/irq.h6
-rw-r--r--src/drivers/uart.a.h8
-rw-r--r--src/drivers/uart.c22
-rw-r--r--src/drivers/uart.h7
-rw-r--r--src/sys/core.c (renamed from src/lib.c)54
-rw-r--r--src/sys/core.h (renamed from src/lib.h)44
-rw-r--r--src/sys/power.c7
-rw-r--r--src/sys/power.h6
-rw-r--r--src/util/time.c (renamed from src/time.c)40
-rw-r--r--src/util/time.h14
14 files changed, 176 insertions, 77 deletions
diff --git a/Unix.mk b/Unix.mk
index 5bc4697..3863264 100644
--- a/Unix.mk
+++ b/Unix.mk
@@ -58,9 +58,11 @@ obj/%.ao: src/%.S
${AS} ${AFLAGS} -c $< -o $@
run: build/kernel.elf
+ @echo Starting QEMU
@${QEMU} -kernel $< ${QFLAGS}
run-debug: build/kernel-g.elf
+ @echo Starting QEMU in Debug Mode
@${QEMU} -kernel $< -s -S ${QFLAGS}
debug: build/kernel-g.elf build/kernel.list
diff --git a/Win.mk b/Win.mk
index efc0123..cd268fe 100644
--- a/Win.mk
+++ b/Win.mk
@@ -58,9 +58,11 @@ obj/%.ao: src/%.S
${AS} ${AFLAGS} -c $< -o $@
run: build/kernel.elf
+ @echo Starting QEMU
@${QEMU} -kernel $< ${QFLAGS}
run-debug: build/kernel-g.elf
+ @echo Starting QEMU in Debug Mode
@${QEMU} -kernel $< -s -S ${QFLAGS}
debug: build/kernel-g.elf build/kernel.list
diff --git a/src/boot.S b/src/boot.S
index 7aa21fc..b1adae7 100644
--- a/src/boot.S
+++ b/src/boot.S
@@ -55,7 +55,8 @@ reset:
irq:
push {r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,lr}
- bl a_irq_handler
+ //bl a_irq_handler
+ bl c_irq_handler
pop {r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,lr}
subs pc, lr, #4
diff --git a/src/cpu/irq.c b/src/cpu/irq.c
new file mode 100644
index 0000000..26883a2
--- /dev/null
+++ b/src/cpu/irq.c
@@ -0,0 +1,38 @@
+#include "../cpu/irq.h"
+#include "../sys/core.h"
+#include "../drivers/uart.a.h"
+#include "../util/time.h"
+
+extern void disable_irq(void);
+extern void enable_irq(void);
+
+void c_irq_handler(void) {
+ disable_irq();
+ unsigned long source = load32(CORE0_IRQ_SOURCE);
+ if (source & (1 << 8)) {
+ if(load32(IRQ_PENDING2) & (1 << 25)) {
+ if(load32(UART0_MIS) & (1<<4)) {
+ unsigned long data = load32(UART0_DR);
+ if(data == 0x74) {
+ unsigned long timer_status;
+ asm volatile("mrc p15, 0, %0, c14, c3, 1" : "=r"(timer_status));
+ if(timer_status == 0) {
+ cntfrq = read_cntfrq();
+ write_cntv_tval(cntfrq);
+ enable_cntv();
+ } else {
+ disable_cntv();
+ }
+ }
+ uart_char((unsigned char)data);
+ //uart_string((char*)" c_irq_handler\n");
+ enable_irq();
+ return;
+ }
+ }
+ } else if (source & (1 << 3)) {
+ c_timer();
+ enable_irq();
+ }
+ return;
+}
diff --git a/src/cpu/irq.h b/src/cpu/irq.h
new file mode 100644
index 0000000..f0a2656
--- /dev/null
+++ b/src/cpu/irq.h
@@ -0,0 +1,6 @@
+#ifndef IRQ_H
+#define IRQ_H
+
+void c_irq_handler(void);
+
+#endif
diff --git a/src/drivers/uart.a.h b/src/drivers/uart.a.h
new file mode 100644
index 0000000..d4bf199
--- /dev/null
+++ b/src/drivers/uart.a.h
@@ -0,0 +1,8 @@
+#ifndef UART_AH
+#define UART_AH
+
+extern void uart_char(unsigned char c);
+extern void uart_hex(unsigned long data);
+extern void uart_string(char* message);
+
+#endif
diff --git a/src/drivers/uart.c b/src/drivers/uart.c
new file mode 100644
index 0000000..f7f15c2
--- /dev/null
+++ b/src/drivers/uart.c
@@ -0,0 +1,22 @@
+#include "uart.a.h"
+
+void uart_hexn(unsigned long c_val) {
+ uart_hex(c_val);
+ uart_char(0x0a);
+}
+
+void uart_10(unsigned long val) {
+ unsigned long t = val;
+ unsigned long c;
+ char buffer[11] = "0000000000\0";
+ char* dptr = buffer + 9;
+ for(int i = 0; i <= 10; i++) {
+ c = t%10;
+ *dptr = 0x30 + (c&0xF);
+ t /= 10;
+ if (t==0)
+ break;
+ dptr -= 1;
+ }
+ uart_string(dptr);
+}
diff --git a/src/drivers/uart.h b/src/drivers/uart.h
new file mode 100644
index 0000000..c78398b
--- /dev/null
+++ b/src/drivers/uart.h
@@ -0,0 +1,7 @@
+#ifndef UART_H
+#define UART_H
+
+void uart_hexn(unsigned long);
+void uart_10(unsigned long);
+
+#endif
diff --git a/src/lib.c b/src/sys/core.c
index d21009b..0420df0 100644
--- a/src/lib.c
+++ b/src/sys/core.c
@@ -1,18 +1,8 @@
-#include "lib.h"
-
-extern void uart_char(unsigned char c);
-extern void uart_hex(unsigned long data);
-extern void uart_string(char* message);
-
-extern unsigned long read_cntv_tval();
-extern unsigned long read_cntfrq();
-extern void write_cntv_tval(unsigned long); // Clear cntv interrupt and set next 1 second timer
-extern void routing_core0cntv_to_core0irq();
-extern void enable_cntv();
-
-void uart_10(unsigned long);
-
-extern unsigned long cntfrq;
+#include "../drivers/uart.a.h"
+#include "../drivers/uart.h"
+#include "../util/time.h"
+#include "../sys/core.h"
+#include "../sys/power.h"
static char* os_info_h = "\033[93mInitialized the Real Time Operating System\033[0m\n\033[96mName\033[0m: \033[94mDendritOS\033[0m\n\033[96mVersion\033[0m: \033[95m";
static char* os_info_t = "\033[0m\n\nQEMU\n====\n Exit : Ctrl-A x\n Monitor : Ctrl-A c\n\n";
@@ -25,24 +15,6 @@ static char* os_info_v = VERSION;
static char* irq_on = " \033[92mEnabled\033[0m\n";
static char* irq_off = " \033[91mDisabled\033[0m\n";
-static inline unsigned long load32(unsigned long addr) {
- return *(volatile unsigned long*)addr;
-}
-
-static inline void store32(unsigned long value, unsigned long addr) {
- *(volatile unsigned long*)addr = value;
-}
-
-static inline void delay(unsigned long cycles) {
- asm volatile("__delay_%=: subs %[cycles], %[cycles], #1;bne __delay_%=\n"
- : "=r"(cycles): [cycles]"0"(cycles) : "cc");
-}
-
-void uart_hexn(unsigned long c_val) {
- uart_hex(c_val);
- uart_char(0x0a);
-}
-
// Initialize IRQs
void sysinit() {
// Mask Overrun of UART0
@@ -150,19 +122,3 @@ void postinit() {
uart_string(os_info_v);
uart_string(os_info_t);
}
-
-void uart_10(unsigned long val) {
- unsigned long t = val;
- unsigned long c;
- char buffer[11] = "0000000000\0";
- char* dptr = buffer + 9;
- for(int i = 0; i <= 10; i++) {
- c = t%10;
- *dptr = 0x30 + (c&0xF);
- t /= 10;
- if (t==0)
- break;
- dptr -= 1;
- }
- uart_string(dptr);
-}
diff --git a/src/lib.h b/src/sys/core.h
index 936a582..d2b4c1b 100644
--- a/src/lib.h
+++ b/src/sys/core.h
@@ -1,3 +1,21 @@
+#ifndef CORE_H
+#define CORE_H
+
+extern unsigned long cntfrq;
+
+static inline unsigned long load32(unsigned long addr) {
+ return *(volatile unsigned long*)addr;
+}
+
+static inline void store32(unsigned long value, unsigned long addr) {
+ *(volatile unsigned long*)addr = value;
+}
+
+static inline void delay(unsigned long cycles) {
+ asm volatile("__delay_%=: subs %[cycles], %[cycles], #1;bne __delay_%=\n"
+ : "=r"(cycles): [cycles]"0"(cycles) : "cc");
+}
+
enum
{
// The offset for the MMIO area
@@ -75,5 +93,29 @@ enum
MBOX_STATUS = (MBOX_BASE + 0x18),
MBOX_WRITE = (MBOX_BASE + 0x20),
- GPU_INTERRUPTS_ROUTING = 0x4000000C
+ GPU_INTERRUPTS_ROUTING = 0x4000000C,
+
+ CORE0_TIMER_IRQCNTL = 0x40000040,
+ CORE0_IRQ_SOURCE = 0x40000060,
+
+ /* Power Management, Reset controller and Watchdog registers */
+ //BCM2835_PERI_BASE = 0x3F000000,
+ BCM2835_PERI_BASE = 0x20000000,
+ PM_BASE = (BCM2835_PERI_BASE + 0x100000),
+ PM_RSTC = (PM_BASE+0x1c),
+ PM_WDOG = (PM_BASE+0x24),
+ PM_WDOG_RESET = 0x00000000,
+ PM_PASSWORD = 0x5a000000,
+ PM_WDOG_TIME_SET = 0x000fffff,
+ PM_RSTC_WRCFG_CLR = 0xffffffcf,
+ PM_RSTC_WRCFG_SET = 0x00000030,
+ PM_RSTC_WRCFG_FULL_RESET = 0x00000020,
+ PM_RSTC_RESET = 0x00000102
};
+
+void sysinit();
+void c_timer();
+void chk_irq_stat();
+void postinit();
+
+#endif
diff --git a/src/sys/power.c b/src/sys/power.c
new file mode 100644
index 0000000..4abee01
--- /dev/null
+++ b/src/sys/power.c
@@ -0,0 +1,7 @@
+#include "../sys/core.h"
+#include "../sys/power.h"
+
+void reboot(void) {
+ store32(PM_WDOG, PM_PASSWORD | 1);
+ store32(PM_RSTC, PM_PASSWORD | PM_RSTC_WRCFG_FULL_RESET);
+}
diff --git a/src/sys/power.h b/src/sys/power.h
new file mode 100644
index 0000000..711842b
--- /dev/null
+++ b/src/sys/power.h
@@ -0,0 +1,6 @@
+#ifndef SYS_POWER_H
+#define SYS_POWER_H
+
+void reboot(void);
+
+#endif
diff --git a/src/time.c b/src/util/time.c
index d637612..72fc52b 100644
--- a/src/time.c
+++ b/src/util/time.c
@@ -1,16 +1,4 @@
-static inline unsigned long load32(unsigned long addr) {
- return *(volatile unsigned long*)addr;
-}
-
-static inline void store32(unsigned long value, unsigned long addr) {
- *(volatile unsigned long*)addr = value;
-}
-
-#define uint64_t unsigned long long
-#define uint32_t unsigned long
-
-#define CORE0_TIMER_IRQCNTL 0x40000040
-#define CORE0_IRQ_SOURCE 0x40000060
+#include "../sys/core.h"
void routing_core0cntv_to_core0irq(void)
{
@@ -20,57 +8,57 @@ void routing_core0cntv_to_core0irq(void)
//store32(0x80, CORE0_TIMER_IRQCNTL);
}
-uint32_t read_core0timer_pending(void)
+unsigned long read_core0timer_pending(void)
{
- uint32_t tmp;
+ unsigned long tmp;
tmp = load32(CORE0_IRQ_SOURCE);
return tmp;
}
void enable_cntv(void)
{
- uint32_t cntv_ctl;
+ unsigned long cntv_ctl;
cntv_ctl = 1;
asm volatile ("mcr p15, 0, %0, c14, c3, 1" :: "r"(cntv_ctl) ); // write CNTV_CTL
}
void disable_cntv(void)
{
- uint32_t cntv_ctl;
+ unsigned long cntv_ctl;
cntv_ctl = 0;
asm volatile ("mcr p15, 0, %0, c14, c3, 1" :: "r"(cntv_ctl) ); // write CNTV_CTL
}
-uint64_t read_cntvct(void)
+unsigned long long read_cntvct(void)
{
- uint64_t val;
+ unsigned long long val;
asm volatile("mrrc p15, 1, %Q0, %R0, c14" : "=r" (val));
return (val);
}
-uint64_t read_cntvoff(void)
+unsigned long long read_cntvoff(void)
{
- uint64_t val;
+ unsigned long long val;
asm volatile("mrrc p15, 4, %Q0, %R0, c14" : "=r" (val));
return (val);
}
-uint32_t read_cntv_tval(void)
+unsigned long read_cntv_tval(void)
{
- uint32_t val;
+ unsigned long val;
asm volatile ("mrc p15, 0, %0, c14, c3, 0" : "=r"(val) );
return val;
}
-void write_cntv_tval(uint32_t val)
+void write_cntv_tval(unsigned long val)
{
asm volatile ("mcr p15, 0, %0, c14, c3, 0" :: "r"(val) );
return;
}
-uint32_t read_cntfrq(void)
+unsigned long read_cntfrq(void)
{
- uint32_t val;
+ unsigned long val;
asm volatile ("mrc p15, 0, %0, c14, c0, 0" : "=r"(val) );
return val;
}
diff --git a/src/util/time.h b/src/util/time.h
new file mode 100644
index 0000000..1fb3906
--- /dev/null
+++ b/src/util/time.h
@@ -0,0 +1,14 @@
+#ifndef TIME_H
+#define TIME_H
+
+void routing_core0cntv_to_core0irq(void);
+unsigned long read_core0timer_pending(void);
+void enable_cntv(void);
+void disable_cntv(void);
+unsigned long long read_cntvct(void);
+unsigned long long read_cntvoff(void);
+unsigned long read_cntv_tval(void);
+void write_cntv_tval(unsigned long val);
+unsigned long read_cntfrq(void);
+
+#endif
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-26 04:51:03 +0000